Question P4–P5–P6 Units and parts
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Four workshops used paint to decorate murals for a festival. Workshop P used 6 litres less than Workshop Q. Workshop R used twice as much paint as Workshop Q. Workshop S used 3 litres less than Workshop R. In total the four workshops used 63 litres of paint. How many litres did Workshop S use?
Answer
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Cut one amount into equal shares. One number tells you what a share is worth.
In this one. Restore the 6-litre and 3-litre shortfalls first, so the adjusted total can be split into 6 equal Workshop-Q units.
A single amount is split by a ratio, a fraction or a percentage. One extra number gives you the leftover, the difference, or the value of one share.
Children match the given number to the wrong number of shares, using the whole bar when the number covers only the leftover or the difference between two people's shares.
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